V-Tech VT-BDU Manual - Manual (Page 3)

-3-
3.2 Star distribute connection
VT System Distributor
VT-BDU
4
AC ~
AC ~
AC ~
AC ~
AC ~
AC ~
VT-BDU
4B 3Y 2W 1R
4B 3Y 2W 1R
4B 3Y 2W 1R
4B 3Y 2W 1R
VT
-BDU
JW/VP1
JW/VP2
JW/VP3
JW/OS
HI 75R 150R
SET
-3Y
SET-3Y
Note:SET-3Y set to 75R when the distance
from door station to BDU is within 50
meters,otherwise set to 150R.